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Martindale PD440S 440V AC Proving Unit

  • Provides reliable 440V nominal output for safe electrical testing
  • Compatible with a wide range of voltage indicators and testers
  • Durable and easy-to-use design with a magnetic hanger
  • Compact and portable for convenience in various work environments
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£116.00 (ex VAT)

£139.20 (inc VAT)

Earn 116 points

Usually Ships In 3 to 5 Business Days
Martindale PD440S 440V AC Proving Unit

The Martindale PD440S 440V AC Proving Unit ensures safe electrical work by delivering a reliable voltage output. It is a direct upgrade from the industry-standard PD440, designed to match the output requirements of voltage indicators such as the VI13800, MTL10, and MTL20 Drummond test lamps, and all other 440V testers. This unit guarantees precise functionality, offering instant test voltage for both high and low impedance devices, ensuring compliance with the Electricity at Work Regulations.

Enhanced Design and Functionality

The PD440S features a robust overmoulded low-profile case, providing enhanced durability for tough working conditions. The included MG3 magnetic hanger (excluding kits) allows for easy handling and convenient storage. The colour-coded design of the new S and SX Series simplifies matching with Martindale voltage indicators, making it easier to ensure you are using the correct device. This proving unit is fast and user-friendly, immediately supplying the necessary test voltage for all compatible equipment.

Designed for professionals, the PD440S operates within a temperature range of -10°C to 40°C and can handle up to 70% relative humidity, making it suitable for various environments. The unit is powered by six 1.5V AA alkaline batteries, ensuring long-lasting performance. With dimensions of 150 x 80 x 35mm and a weight of approximately 350g, including batteries, it is both compact and portable.


Key Features
  • Ensures safe electrical work by providing reliable voltage output
  • Matches output requirements of VI13800, MTL10, and MTL20 test lamps
  • Suitable for all 440V voltage indicators and testers
  • Features a tough overmoulded low-profile case for durability
  • Comes with an MG3 magnetic hanger for easy handling and storage
  • Colour-coded for easy matching with Martindale voltage indicators
  • Instantly supplies test voltage for high and low impedance devices
  • Operates within a temperature range of -10°C to 40°C
  • Can handle up to 70% relative humidity
  • Powered by six 1.5V AA alkaline batteries
  • Compact and portable with dimensions of 150 x 80 x 35mm and a weight of 350g

Technical Specifications
  • Output voltage: 440V nominal
  • Output frequency: 50Hz nominal
  • Output loading: See datasheet
  • Temperature (Operating & Storage): -10°C to 40°C
  • Humidity (Operating & Storage): Max. 70% R.H.
  • Altitude: Up to 2000m
  • Pollution Degree: 2
  • Power: 6 x 1.5V, AA alkaline batteries (IEC LR6, NEDA 15A)
  • Dimensions: 150 x 80 x 35mm
  • Weight: 350g approx. with batteries
Martindale PD440S 440V AC Proving Unit

The Martindale PD440S 440V AC Proving Unit ensures safe electrical work by delivering a reliable voltage output. It is a direct upgrade from the industry-standard PD440, designed to match the output requirements of voltage indicators such as the VI13800, MTL10, and MTL20 Drummond test lamps, and all other 440V testers. This unit guarantees precise functionality, offering instant test voltage for both high and low impedance devices, ensuring compliance with the Electricity at Work Regulations.

Enhanced Design and Functionality

The PD440S features a robust overmoulded low-profile case, providing enhanced durability for tough working conditions. The included MG3 magnetic hanger (excluding kits) allows for easy handling and convenient storage. The colour-coded design of the new S and SX Series simplifies matching with Martindale voltage indicators, making it easier to ensure you are using the correct device. This proving unit is fast and user-friendly, immediately supplying the necessary test voltage for all compatible equipment.

Designed for professionals, the PD440S operates within a temperature range of -10°C to 40°C and can handle up to 70% relative humidity, making it suitable for various environments. The unit is powered by six 1.5V AA alkaline batteries, ensuring long-lasting performance. With dimensions of 150 x 80 x 35mm and a weight of approximately 350g, including batteries, it is both compact and portable.

Key Features
  • Ensures safe electrical work by providing reliable voltage output
  • Matches output requirements of VI13800, MTL10, and MTL20 test lamps
  • Suitable for all 440V voltage indicators and testers
  • Features a tough overmoulded low-profile case for durability
  • Comes with an MG3 magnetic hanger for easy handling and storage
  • Colour-coded for easy matching with Martindale voltage indicators
  • Instantly supplies test voltage for high and low impedance devices
  • Operates within a temperature range of -10°C to 40°C
  • Can handle up to 70% relative humidity
  • Powered by six 1.5V AA alkaline batteries
  • Compact and portable with dimensions of 150 x 80 x 35mm and a weight of 350g

Technical Specifications
  • Output voltage: 440V nominal
  • Output frequency: 50Hz nominal
  • Output loading: See datasheet
  • Temperature (Operating & Storage): -10°C to 40°C
  • Humidity (Operating & Storage): Max. 70% R.H.
  • Altitude: Up to 2000m
  • Pollution Degree: 2
  • Power: 6 x 1.5V, AA alkaline batteries (IEC LR6, NEDA 15A)
  • Dimensions: 150 x 80 x 35mm
  • Weight: 350g approx. with batteries

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